The ISS completes an orbit every 90 minutes, providing a constantly changing view of the world below.

Some of the images of planet Earth highlighted here each week are taken by astronauts orbiting aboard the International Space Station.

They are part of missions supervised by the Johnson Space Center called the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory.

When not involved in other duties, astronauts spend time capturing images of the Earth, celestial objects and visiting space vehicles they believe could be useful to those on the ground and elsewhere on the ISS.